package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {


    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 获得营业额统计
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {

        //获得日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }


        ArrayList arrayList = new ArrayList();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            turnover=turnover==null?0.0:turnover;

            arrayList.add(turnover);
        }



        //封装返回结果
        return TurnoverReportVO.builder()
                .dateList( StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(arrayList,","))
                .build();
    }

    /**
     * 获得用户数据统计
     *
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //获得日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList=new ArrayList<>();
        List<Integer> totalUserList =new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap<>();
            map.put("end",endTime);
            Integer totalUser=userMapper.countByMap(map);
            totalUserList.add(totalUser);
            map.put("end",endTime);
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);

        }




        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        //获得日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的订单数目
        List<Integer> orderCount=new ArrayList<>();
        //存放每天的订单总数
        List<Integer> validOrderCount=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount1 = getOrderCount(beginTime, endTime, null);
            orderCount.add(orderCount1);
            Integer validOrderCount1 = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            validOrderCount.add(validOrderCount1);
        }

        //计算总的订单数目
        Integer totalOrder = orderCount.stream().reduce(Integer::sum).get();
        //计算有效的订单总数目
        Integer validOrder = validOrderCount.stream().reduce(Integer::sum).get();
        //计算订单完成率
        Double orderCompletionRate=0.0;
        if(totalOrder!=null){
            orderCompletionRate =validOrder/totalOrder.doubleValue();
        }




        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCount,","))
                .validOrderCountList(StringUtils.join(validOrderCount,","))
                .totalOrderCount(totalOrder)
                .validOrderCount(validOrder)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }



    /**
     * 获得订单数目
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map=new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return orderMapper.getCountByMap(map);

    }

    /**
     * 获得销量前10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end,LocalTime.MAX);
        List<GoodsSalesDTO> top10 = orderMapper.getTop10(beginTime, endTime);
        List<String> names = top10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberTop10 = top10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(names,","))
                .numberList(StringUtils.join(numberTop10,","))
                .build();



    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessDate(HttpServletResponse response) {
        //1.获得概览数据
        LocalDate beginTime = LocalDate.now().minusDays(30);
        LocalDate endTime = LocalDate.now().minusDays(1);

        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(beginTime, LocalTime.MIN), LocalDateTime.of(endTime, LocalTime.MAX));

        //2.通过POI将数据填入EXCEl表格
        InputStream in=this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件，创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet1页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue("时间："+beginTime+"至"+endTime);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
           row= sheet.getRow(4);
           row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
           row.getCell(4).setCellValue(businessDataVO.getUnitPrice());


            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = beginTime.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getValidOrderCount());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());



            }
            //3.通过输出流将Excel表格下载到客户端浏览器
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);

            //4.关闭一下资源
            excel.close();
            outputStream.close();


        } catch (IOException e) {
            throw new RuntimeException(e);
        }


    }
}
